<!DOCTYPE html>
<html lang="en">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>根据user_name查询</title>

</head>
<body>
<form action="/cityquery" method="post">
    请输入用户名查询：<br>
    <input type="text" name="user_name">
    <input type="submit" value="查询">
</form>
</body>
</html>